CVE-2017-1000373

MEDIUM

OpenBSD <6.1 - RCE

Title source: llm

Description

The OpenBSD qsort() function is recursive, and not randomized, an attacker can construct a pathological input array of N elements that causes qsort() to deterministically recurse N/4 times. This allows attackers to consume arbitrary amounts of stack memory and manipulate stack memory to assist in arbitrary code execution attacks. This affects OpenBSD 6.1 and possibly earlier versions.

Exploits (1)

exploitdb WORKING POC VERIFIED

by Qualys Corporation · clocalopenbsd

https://www.exploit-db.com/exploits/42271

View Code ZIP pw:eip

References (9)

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/99177

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1039427

[Mitigation, Third Party Advisory] https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/qsort.c?rev=1.15&content-type=text/x-cvsweb-markup

[Vendor Advisory] https://support.apple.com/HT208112

[Vendor Advisory] https://support.apple.com/HT208113

[Third Party Advisory] https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

[Exploit, Third Party Advisory] https://www.exploit-db.com/exploits/42271/

[Vendor Advisory] https://support.apple.com/HT208115

[Vendor Advisory] https://support.apple.com/HT208144

Scores

CVSS v3 6.5

EPSS 0.1875

EPSS Percentile 95.2%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Details

CWE

CWE-400

Status published

Products (2)

openbsd/openbsd < 6.1

n/a/n/a

Published Jun 19, 2017

Tracked Since Feb 18, 2026